Quasi-phase-matched second-harmonic generation by use of a total-internal-reflection phase shift in gallium arsenide and zinc selenide plates

We fabricated a novel quasi-phase-matched frequency converter, using a zigzag optical beam path in a thin, polished parallel plate. Second-harmonic generation experiments demonstrated angle-tuned output at 4.6 to $5.3 \mathit{\mu }\mathrm{m}$ in GaAs and 1.7 to $2.0 \mathit{\mu }\mathrm{m}$ in ZnSe crystals when pulsed infrared laser sources were used.